package com.spzx.product.controller;

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONArray;
import com.github.pagehelper.PageHelper;
import com.spzx.common.core.exception.ServiceException;
import com.spzx.common.core.web.controller.BaseController;
import com.spzx.common.core.web.domain.AjaxResult;
import com.spzx.common.core.web.page.TableDataInfo;
import com.spzx.product.api.vo.ProductSkuVo;
import com.spzx.product.config.ThreadPoolConfig;
import com.spzx.product.pojo.Product;
import com.spzx.product.pojo.ProductSku;
import com.spzx.product.query.SkuQuery;
import com.spzx.product.service.*;
import com.spzx.product.vo.*;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadPoolExecutor;

@Tag(name = "聚合数据")
@Slf4j
@RestController
@RequestMapping("/channel")
public class ChannelController extends BaseController {

    @Autowired
    private ICategoryService categoryService;
    @Autowired
    private IProductSkuService productSkuService;
    @Autowired
    private IBrandService brandService;
    @Autowired
    private IProductService productService;
    @Autowired
    private ISkuStockService skuStockService;
    @Autowired
    private IProductDetailsService productDetailsService;
    @Autowired
    private RedisTemplate redisTemplate;
    @Autowired
    private ThreadPoolExecutor threadPoolExecutor;

    @Operation(summary = "获取首页数据")
    @GetMapping("/index")
    public AjaxResult index() {

        List<CategoryVo> levelOneCategory = categoryService.getLevelOneCategory();
        List<ProductSkuVo> topSale = productSkuService.getTopSale();
        IndexDataVo indexDataVo = new IndexDataVo();
        indexDataVo.setCategoryList(levelOneCategory);
        indexDataVo.setProductSkuList(topSale);
        return success(indexDataVo);
    }

    @Operation(summary = "获取分类嵌套列表")
    @GetMapping( "/category")
    public AjaxResult category() {
        return success(categoryService.tree());
    }

    @Operation(summary = "显示商品列表")
    @GetMapping("/skuList/{pageNum}/{pageSize}")
    public TableDataInfo skuList(
            @Parameter(description = "当前页码")
            @PathVariable Integer pageNum,

            @Parameter(description = "每页记录数")
            @PathVariable Integer pageSize,

            SkuQuery skuQuery) {

        PageHelper.startPage(pageNum, pageSize);
        List<ProductSkuVo> list = productSkuService.selectProductSkuList(skuQuery);
        return getDataTable(list);
    }


    @Operation(summary = "获取全部品牌")
    @GetMapping("/brand")
    public AjaxResult selectBrandAll() {
        return success(brandService.list());
    }

    @Operation(summary = "商品详情")
    @GetMapping("/item/{skuId}")
    public AjaxResult item(
            @Parameter(description = "skuId")
            @PathVariable Long skuId) {

        Boolean res = redisTemplate.opsForValue().getBit("product:sku:data:ids", skuId);
        if (!res) {
            log.error("商品不存在");
            throw new ServiceException("商品不存在");
        }

        ItemVo itemVo = new ItemVo();


        // 使用 CompletableFuture，创建异步编排任务，用于获取商品详情数据
        CompletableFuture<Long> futureProductSku = CompletableFuture.supplyAsync(
                () -> {
                    // 获取商品 sku
                    ProductSku productSku = productSkuService.getProductSkuById(skuId);
                    // 获取商品 id
                    Long productId = productSku.getProductId();
                    //获取sku信息
                    itemVo.setProductSku(productSku);
                    // 返回商品 id
                    return productId;
                },
                threadPoolExecutor);

        // 基于前序任务的返回结果
        futureProductSku.thenAcceptAsync(productId -> {
            //获取商品信息
            Product product = productService.getById(productId);
            //商品信息：轮播图列表
            String[] sliderUrlList = product.getSliderUrls().split(",");
            itemVo.setSliderUrlList(sliderUrlList);
            //商品信息:商品规格列表
            JSONArray specValueList = JSON.parseArray(product.getSpecValue());
            itemVo.setSpecValueList(specValueList);
        });

        CompletableFuture<Void> futureProductDetails = futureProductSku.thenAcceptAsync(productId -> {
            //获取商品详情图片
            itemVo.setDetailsImageUrlList(productDetailsService.getProductDetails(productId));
        });

        CompletableFuture<Void> futureSkuSpecValue = futureProductSku.thenAcceptAsync(productId -> {
            //获取商品规格Map
            itemVo.setSkuSpecValueMap(productSkuService.getSkuSpecValue(productId));
        });

        CompletableFuture<Void> futureSkuPrice = CompletableFuture.runAsync(() -> {
            //获取商品最新价格
            itemVo.setSkuPrice(productSkuService.getSkuPrice(skuId));
        }, threadPoolExecutor);

        CompletableFuture<Void> futureSkuStock = CompletableFuture.runAsync(() -> {
            //获取商品库存信息
            itemVo.setSkuStock(skuStockService.getSkuStock(skuId));
        }, threadPoolExecutor);

        CompletableFuture
            .allOf(
                futureProductSku,
                futureProductDetails,
                futureSkuSpecValue,
                futureSkuPrice,
                futureSkuStock)
            .join();

        return success(itemVo);
    }
}